Chapter 5 of railstutorial.org (http://ruby.railstutorial.org/chapters/filling-in-the-layout#top) talks about how to create a basic layout for a web site. I use it as a resource for putting a Rails web site together.
I'm having difficulty customizing the navbar/header. While changing the font color of the "sample app" logo is straightforward enough (just change the RGB setting of the color parameter under #logo), how do I change parameters in the rest of the header? How do I change that black bar to be some other color, such as dark blue/green/red/purple/brown/etc.? How do I change the color of the menu links (Home/Help/Sign Up) from the default gray to yellow? Or orange? Or some other color?